February 1921 ปรากฏการณ์ท้องฟ้า

Observer Location:Beijing (39.904°, 116.407°)

ภาพรวมดาวเคราะห์

18 sky events total, including 3 moon phases and 4 planetary events.

เหตุการณ์ท้องฟ้า

All times are in local time (Asia/Shanghai)

Group วันที่ Sunrise/Sunset Moonrise/Moonset Moon Phase ปรากฏการณ์ท้องฟ้า

Planetary outlook

February 1921 mid-month observing conditions

Mercury

Excellent
Apparent magnitude: -0.6
กลุ่มดาว: Pisces
Angular diameter: 7.0"
Status: near greatest western elongation

Observation tip: Very bright, easily visible to the naked eye; Mercury stays close to the Sun; best seen at dusk or dawn

Right ascension: 22h59m13s
เดคลิเนชัน: -05°30'26"

Venus

Excellent
Apparent magnitude: -4.6
กลุ่มดาว: Aries
Angular diameter: 25.3"
Status: near superior conjunction

Observation tip: Very bright, easily visible to the naked eye; Venus is the brightest planet and is best seen at dusk or dawn

Right ascension: 00h43m02s
เดคลิเนชัน: +06°30'47"

Mars

Excellent
Apparent magnitude: 1.3
กลุ่มดาว: Aries
Angular diameter: 4.4"
Status: near western quadrature

Observation tip: Visible to the naked eye; Its reddish appearance is obvious; it is best observed near opposition

Right ascension: 00h05m46s
เดคลิเนชัน: +00°04'30"

Jupiter

Excellent
Apparent magnitude: -2.5
กลุ่มดาว: Virgo
Angular diameter: 44.0"
Status: near eastern quadrature

Observation tip: Very bright, easily visible to the naked eye; Its moons are easy to spot and it is excellent for telescope observing

Right ascension: 11h11m35s
เดคลิเนชัน: +06°43'33"

Saturn

Excellent
Apparent magnitude: 0.7
กลุ่มดาว: Virgo
Angular diameter: 19.5"
Status: near eastern quadrature

Observation tip: Visible to the naked eye; Saturn’s rings require a telescope to see clearly

Right ascension: 11h39m11s
เดคลิเนชัน: +04°46'36"

Uranus

Fair
Apparent magnitude: 6.0
กลุ่มดาว: Pisces
Angular diameter: 3.4"
Status: near western quadrature

Observation tip: A telescope is required; Binoculars or a telescope are recommended

Right ascension: 22h28m42s
เดคลิเนชัน: -10°20'01"

Neptune

Fair
Apparent magnitude: 7.8
กลุ่มดาว: Leo
Angular diameter: 2.3"
Status: near western quadrature

Observation tip: A telescope is required; A telescope is required; Neptune appears blue-green

Right ascension: 08h57m56s
เดคลิเนชัน: +17°14'40"

Moon

Excellent
Apparent magnitude: -12.7
กลุ่มดาว: Taurus
Angular diameter: 12219.6"
Status: Moon illumination 41.6%

Observation tip: Moon illumination 41.6%; good for observing lunar surface detail

Right ascension: 02h55m52s
เดคลิเนชัน: +15°13'26"